If you're lost in a new city, you might ask a stranger for directions. They'll probably help for free.
Nowadays, you can easily reach strangers worldwide by phone, email or text messages. Ease of access doesn't obligate them to help you. Try these other options first.
This podcast accompanies a blog post at Riscario Insider: http://blog.riscario.com/2010/08/how-to-get-free-help-from-stranger.html